Affected trips:517 (3:30 pm from South Station)519 (4:20 pm from South Station)591 (4:30 pm from South Station)521 (5:00 pm from South Station)593 (5:10 pm from South Station)523 (5:40 pm from South Station)595 (5:50 pm from South Station)525 (6:15 pm from South Station)527 (6:45 pm from South Station)